Backup:
$ pg_dump -U {user-name} {source_db} -f {dumpfilename.sql}
Restore:
$ psql -U {user-name} -d {desintation_db} -f {dumpfilename.sql}
$ pg_dump -U {user-name} {source_db} -f {dumpfilename.sql}
$ psql -U {user-name} -d {desintation_db} -f {dumpfilename.sql}